Tubing anchor



Jan. 15, 1929. 1,699,051

E. v. cnowau.

TBING ANCHOR 0riginal Filed llay 18, 1925 INVENTOR. 157d l/Cmwe/Z A TTORNE Y.

Patentd Jan. 15, 1929.

UNITED STATES ERI) V. CROWELL, OF LOS ANGELES, CALIFORNIA.

TUBING ANCI-IOR.

Origina1 application fi1ed May 18, 1925, Serial No. 31,018, Divided and this application fl1ed December 4,

This invention relates to tubing ancl1ors, the present application being a division of my copencling application Ser. No. 81,012, filecl May 18, 1925; ancl it is the ob]eet of tlns invntion to provicle for movement of a str1ng of well tubing relative to its anchonpg means when the latter is lockecl in a Well eas1ng, W1th saicl relative movement cushioned ancl finally limitecl to anchor the tubing without shock or It is a further obj ect of the invention to provicle a eushioned tubirig anchor whicl1 1s aclaptecl for automatie operatio n in the event of sucltlen dropping of the tub1ng clurmg 1ts withdrawal from a vvell bore, ancl whieh 1s also manually operative nuclei control of the tubing ancl at the Will of the operator as the tubingis being loiverecl in a well bore.

It is a still further object of the 1nvent1on to operate a tubing anehor by movement of a string of tubii1g relative to a loekmg m eans aclapted to be frietionalb helcl 1D a W ell casing, the frictional retaimng means be1pg arrangecl for reacly yielcling unt1l such time as it is clesirecl to operate the anchor.

It is a st-ill fnrther object of the invention io eonstruet the frictional retaining means so that it Will holcl the parte in position to pro vent acciclental operation of the ane hor as the t-ubing is lowerecl in a well, and w1ll te nd to retain tl1e parts in position ior automat1c operation of the anchor in the event of the tub ing breaking clurii1g its elevation from the well.

Further objeets of the invention Will be reaclily under'st-oocl from tl ie -follovvmg deseription of the aeconipanymg drawmgs, 1n which:

Fig. 1 is a sicle elevat1on, partly 1 n ax1al section, shovving the improved tnbmg anchor in inoperative posit-ion.

Fig. 2 is a similar view sl 1owing the tubing anchor in operative pos1t1on.

Figs. 3, 4, 5 ancl 6 are transverse seet1ons on tbe linee inclicated in Fig. 1.

A usual string of casing 1 extencls into the well boro 2,ancl a string of tubing 3 is adapted ior reception in the casi'ng in spacecl relat1on from its Wall. One section 4 of the string oftubing is connectecl by coupling collars 5 to the encls of next acljacent lengths of the string 3; and a sleeve 7 is sliclable on pipe section 4:, ancl'forms an abutment at 1ts upper end, with a spring 11 coilecl on the pipe sect1on between Said abutment aLnd the upper cou- Serial No. 152,564.

pling collar 5, in order to normally shift the sleeve clownwardly relative to the pipe es shown in Fig. I. Said downward movement of the sleeve is limited by abutment of its lower end against a shoulder 12 on the pipe 4.

Sleeve 7 is adapted to be fixed against axial displacement in the Well casing, and for this purpose a slip support 13 is slidably mounted on pipe 4 below sleeve 7 and preferably comprises sleeves 13 ancl 13 having axiallyextending cooperating tongues and recesses 14 at their acljaCent encls, so as to permit relative axial movement of the sleeves and dependent rotation t-hereof relative to pipe 4.

Spring arme 14; eXtend upwarclly fro1n lower sleeve 13 through guide loops 15 on sleeve 13", and slips 16 carried by the arms are aclaptecl to be expancled by sleeve 7 so as to engage the wall of easing 1 end thereby look the sleeve agaiIlst axial movement. For this purpo'se the lower end of sleev'e 7 tapers downwarclly to for1n a weclge 17 Which slides down in baok of the slips for expancling the same when pipe 4 and sleeve7 are lowered relative to the slip support 13.

As the string of tubing is loweredin the Well it is helcl against such axial movement relative to che slip support in order to prevent loeking engagement of the slips, but When the string of tubing is at the desirecl level it is released froin the slip support Which is frietionally held in casing 1, so that further 10Werii1g of the tubing Will shift tl1e Wedge 17 relative to the slips in order to engage the same in the casing ancl thereby look sleeve 7 against axial movement.-

The mens or releasably holding pipe 4 relative to the slip support is shown as comprising guclgeons 18 on the pipe adaptecl to be received in slots 20 extending circumferentially of sleeve 13 with one end of the slots opening clownwardly through the lower end of the sleeve as shoivn at 21.

'hile the stringof tubing is being lowerecl, pipe 4: is turnecl relative to theslip support so that the guclgeons 18 arelo ckeclin slots 20 as shown in Fig. 1, thereby preventing relative axial movement between the pipe and the slip support; and when the tubing is in place tl1e pipe 4 is turned until the gudgeons are in axial alinement With slots 21, to permit lowering of the string of tubing relative to the slip support as shown in Fig; 2.

The means for frictionally holding the slip spirafly disposetl relative to the support, slips m1ried by one Of the sectons, 1nezms on the tubng f01 expunding tbe slips to engage the mail of the well, bora by relative rnovement between thn. tubing mul slip supporb, and nwans f01' lucking the tubn and slip support agninst suid relative mnvement 01' releasing S2L('[ parta '01' sad relative movemcnt by reversv rvlutive turning of the ubng und slip support.

5. In combination, We1l tubing, a slip support on the Well tubiug comprising soctions adapted for relative axial movement but de pendant rotary movement. friction springs fixed ai; their respective encls to the respective l soutions of' the support and adapted to enga,ge the wzfll 01' a well bora, slps carriecl by rme of the secl ions und guidati by the other section, and moans on the tubing f01 expanding che slips t0 engage by relative nmvcmeut between the tubing and slip support.

In testmony whereof I have aflxed my signature.

ERD v. CROWELLQ the Wfl-H of the well boro 2 

